GSC Sentinel-2 PDGS STBD - emits - ESA

More documents

Recommendations

Info

GSC Sentinel-2 PDGS STBDIssue 1 Revision 2 (draft) - 25.07.2010GMES-GSEG-EOPG-TN-09-0031page 41 of 604 DATA VOLUMES ANALYSIS4.1 AssumptionsThe dataflows of a single satellite have been considered in this analysis. All volumefigures shall be doubled to take into account the dual spacecraft constellation.The volume estimations are based on the following assumptions:- The cloud free Level-1C volume is 1/3 of the total Level-1C volume;- Europe data (land + Mediterranean sea) represents 7.5% of the total amount of imageddata.- All the level 1 volumes are intended in JPEG2000 lossless format (image coded inaverage on 7bits/pixel/band which means compression rate of 2.3)4.2 Reference Scenario for the Volumes AnalysisThe global PDGS is a distributed system, federating several stations and centres withdifferent functions and roles contributing to the overall system performance.For all analysis related to data volumes, the baseline operation scenario described in [RD-02] is used as reference and applied on the four ground stations network defined in [RD-04]composed of:CGS-1: Kiruna in Northern Sweeden; CGS-2: Svalbard (used only for the blind orbits of Kiruna) in Norway; CGS-3: Prince Albert in Northern Canada; CGS-4: Maspalomas in the Canary Islands (Spain);The following figure shows this configuration of the PDGS.ESA UNCLASSIFIED – For Official Use© ESAThe copyright of this document is the property of ESA. It is supplied in confidence and shall not be reproduced, copied orcommunicated to any third party without written permission from ESA.
GSC Sentinel-2 PDGS STBDIssue 1 Revision 2 (draft) - 25.07.2010GMES-GSEG-EOPG-TN-09-0031page 42 of 60Figure 15: PDGS Reference ConfigurationThe four stations (CGS-1, CGS-2, CGS-3 and CGS-4) have been chosen merely as anexample. As indicated in the schema and detailed in [RD-02], four different types of centrehave been distinguished according to their functions:- The CGS (Core Ground Station) has two possible configurations:• Light, with data reception role: data reception from satellite, processing up to Level-0 and relaying level-0 received data to the PAC-1.• Full, with combined data reception and data centre roles: data reception fromsatellite, processing up to Level-1C and data dissemination.- Two PACs (PAC-1 and PAC-2), each one holding a collocated LTA service functionensuring long-term data preservation in full redundancy of all Level-0, Level-1B andLevel-1C data. In addition the two PACs are configured differently as regarding their midtermrole:• PAC-1 includes a processing chain configuration to process all CGS-4 circulatedacquisitions and perform medium-term reprocessing operations on a 3 monthslevel-0 archive. It is additionally sized for on-line publishing of one year of cloudfreelevel-1C data collected from all stations.• PAC-2 is sized for on-line publishing of one year of European coverage datasupplied regularly by CGS-1/2/3 and by the PAC-1 for CGS-4 data.ESA UNCLASSIFIED – For Official Use© ESAThe copyright of this document is the property of ESA. It is supplied in confidence and shall not be reproduced, copied orcommunicated to any third party without written permission from ESA.
Page 2 and 3: GSC Sentinel-2 PDGS STBDIssue 1 Rev
Page 13 and 14: - (A 1 - D 1 ) ≤ 100 minutes, i.e
Page 27 and 28: 3.3.2 ANALYSIS OF PARALLELISATION O
Page 45: GSC Sentinel-2 PDGS STBDIssue 1 Rev
Page 59: GSC Sentinel-2 PDGS STBDIssue 1 Rev

GSC Sentinel-2 PDGS STBD - emits - ESA

Create successful ePaper yourself

Delete template?

Save as template?